SKF 18764A Differential Pinion Seal - Rear

Overview

SKF differential pinion seal 18764A is built for rear axle sealing applications that require controlled lubricant retention and contamination resistance. It is a fitment-based replacement for select Chevrolet, GMC, and Cadillac trucks and SUVs with a 9.75-inch ring gear.

This seal uses a polyacrylate sealing surface and application-specific dimensions to match the shaft and housing requirements. SKF 18764A is a practical choice for service work on Chevrolet Silverado 1500, GMC Sierra 1500, and related platforms where pinion seal leakage can affect axle performance.

Key Features

• Polyacrylate sealing surface for axle sealing applications
• Application-specific dimensions: 0.508 width, 3.175 outside diameter, 1.875 shaft diameter
• Rear differential fitment for 9.75-inch ring gear applications
• Engineered for lubricant retention and contaminant exclusion
• SKF part number 18764A for catalog and service identification

Detailed Description

SKF 18764A is a differential pinion seal designed for rear axle service on select Chevrolet, GMC, and Cadillac vehicles. Compatible applications include 2002-2005 Chevrolet Avalanche 1500, Silverado 1500, Suburban 1500, Tahoe, GMC Sierra 1500, Yukon, Yukon XL 1500, and Cadillac Escalade variants with the specified 9.75-inch ring gear. The seal is also listed for Silverado 1500 HD and Sierra 1500 HD applications in the covered years. SKF part number 18764A should be matched to the axle configuration and dimensions before installation.

SKF has a long history in seal engineering, and this product reflects that focus through material selection and design intended for the operating environment of driveline sealing. This part cross-references 26094851 for the same application.

Common Repair Uses

• Stops gear oil seepage at the pinion seal area
• Helps restore proper axle lubricant containment
• Addresses contamination entering the differential housing
• Supports repair of worn or aged sealing surfaces
• Helps correct leaks found during rear axle service

Installation Notes

Verify axle type, ring gear size, and shaft dimensions before installation. Clean the sealing bore and mating surfaces thoroughly, and inspect the pinion yoke or shaft surface for wear that could affect sealing performance. Proper alignment during installation is important for reliable operation.

Quality Assurance

SKF manufactures seals to specific application requirements using premium materials and established design and bonding methods. The brand’s seal engineering background and long-standing OE-level manufacturing focus support consistent fit and function in driveline service.